Many recent longitudinal studies span only a few months or years to avoid problems associated with
A) cohort effects.
B) practice effects.
C) theories and methods becoming outdated.
D) biased sampling.
C
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When given a list of items to remember, people tend to do better at recalling the first items on the list than the middle of the list. This is known as the
a. phi phenomenon. b. recency effect. c. chunking effect. d. primacy effect. e. impression effect.
Adults are at increased risk for depression because they often live with chronic pain that affects their normal activities.
Answer the following statement true (T) or false (F)
Generally, it is impossible for measures to be
a) reliable but not valid. b) valid but not reliable. c) neither reliable nor valid. d) both reliable and valid.
The test that lets you know whether you have a significant difference or differences among means but that doesn't tell you which groups differ involves
a. planned comparisons. b. post hoc comparisons. c. the analysis of variance. d. the Student's t-test.